Combine flour, sugar, xanthan gum, milk powder, and salt in bowl of heavy duty mixer. Use your strongest beaters.
Dissolve the 2 teaspoons of sugar in the 1/2 cup of lukewarm water and mix in the yeast. Set aside while you combine the shortening and 1 1/4 cups water in saucepan and heat until shortening melts.
Turn mixer on low. Blend dry ingredients and slowly add shortening and water mixture and the vinegar. Blend, then add the eggs. This mixture should feel slightly warm.
Pour the yeast mixture into the ingredients in the bowl and beat at highest speed for 2 minutes.
Place mixing bowl in a warm place, cover with plastic wrap and a towel, and let the dough rise approximately 1 to 1 1/2 hours or until doubled. Return to mixer and beat on high for 3 minutes. Spoon the dough into 3 small (2 1/2" x 5") greased loaf pans or 1 large one.
Use muffin tins and bake any remaining as small rolls. Or make all rolls (approximately 18).
Let rise until the dough is slightly above the top of pan. Bake in preheated 400 degree oven for 10 minutes. Place foil over bread and bake large loaves 50 minutes longer, small loaves slightly less time, and rolls about 25 minutes.
NOTES: The dough texture will seem more like cookie dough than bread dough, so don't be alarmed. Bread is better